Abstract: Various embodiments are directed to a method of driving an end effector coupled to an ultrasonic drive system of a surgical instrument. The method comprises generating at least one electrical signal. The at least one electrical signal is monitored against a first set of logic conditions. A first response is triggered when the first set of logic conditions is met. A parameter is determined from the at least one electrical signal.

Abstract: A method for determining motional branch current in an ultrasonic transducer of an ultrasonic surgical device over multiple frequencies of a transducer drive signal. The method may comprise, at each of a plurality of frequencies of the transducer drive signal, oversampling a current and voltage of the transducer drive signal, receiving, by a processor, the current and voltage samples, and determining, by the processor, the motional branch current based on the current and voltage samples, a static capacitance of the ultrasonic transducer and the frequency of the transducer drive signal.

Abstract: A single purpose hand held tool, having a long tubular handle with a pivoting fork grasping device attached perpendicular to the handle by a pivoting support plate. The support plate attaches to four forks extending out parallel to the plate. The top forks extend out 90 degrees upward while the lower forks splay out 60 degrees downward. The forks and support plate are attached to the end of the handle with a removable pin. The forks and support plate pivot to different angles to match the slope of the baffle filter in the kitchen exhaust hood of a restaurant. The support plate pivots through a lot cut in the end of the handle, and is set or locked in place by means of a removable pin. The pin allows the angle of the forks to vary, and is removable to allow the tool to be mounted flat against the wall on a hook or hanger. The top forks of the tool insert under the edge of the baffle lip or turned down edge of the baffle filter housing, and the lower forks support the weight of the filter assembly.

Abstract: An improved coupler cover is provided for preventing foreign matter from contaminating the end surface of a female coupler. This improved coupler cover comprises two diaphragms axially aligned adjacent to each other. Each diaphragm contains a multiplicity of slits which extend outward from the center of the diaphragm to form equal size pie-shaped sections. The multiple slits of the first diaphragm are also offset in position from the multiple slits of the second disphragm. The two diaphragms are secured in a retainer which holds both of the diaphragms relative to the end surface of the coupler.